3.49s+1.29c=100 C is standing for chicken while s is standing for steak. Since the values are per pound, you just have to multiply it. Finally, all you have is 100 so you have a limit.
because the difference between 125 and 250 is 125 and you know that's you rate of change. so we know 0 in time would also be 0 in distance. but since it's one you divide 125 by 5 = 25